xref: /freebsd-src/crypto/heimdal/lib/gssapi/mech/gss_pseudo_random.c (revision 6a068746777241722b2b32c5d0bc443a2a64d80b)
1*ae771770SStanislav Sedov /*
2*ae771770SStanislav Sedov  * Copyright (c) 2007 Kungliga Tekniska Högskolan
3*ae771770SStanislav Sedov  * (Royal Institute of Technology, Stockholm, Sweden).
4*ae771770SStanislav Sedov  * All rights reserved.
5*ae771770SStanislav Sedov  *
6*ae771770SStanislav Sedov  * Redistribution and use in source and binary forms, with or without
7*ae771770SStanislav Sedov  * modification, are permitted provided that the following conditions
8*ae771770SStanislav Sedov  * are met:
9*ae771770SStanislav Sedov  *
10*ae771770SStanislav Sedov  * 1. Redistributions of source code must retain the above copyright
11*ae771770SStanislav Sedov  *    notice, this list of conditions and the following disclaimer.
12*ae771770SStanislav Sedov  *
13*ae771770SStanislav Sedov  * 2. Redistributions in binary form must reproduce the above copyright
14*ae771770SStanislav Sedov  *    notice, this list of conditions and the following disclaimer in the
15*ae771770SStanislav Sedov  *    documentation and/or other materials provided with the distribution.
16*ae771770SStanislav Sedov  *
17*ae771770SStanislav Sedov  * 3. Neither the name of the Institute nor the names of its contributors
18*ae771770SStanislav Sedov  *    may be used to endorse or promote products derived from this software
19*ae771770SStanislav Sedov  *    without specific prior written permission.
20*ae771770SStanislav Sedov  *
21*ae771770SStanislav Sedov  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22*ae771770SStanislav Sedov  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23*ae771770SStanislav Sedov  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24*ae771770SStanislav Sedov  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25*ae771770SStanislav Sedov  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26*ae771770SStanislav Sedov  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27*ae771770SStanislav Sedov  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28*ae771770SStanislav Sedov  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29*ae771770SStanislav Sedov  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30*ae771770SStanislav Sedov  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31*ae771770SStanislav Sedov  * SUCH DAMAGE.
32*ae771770SStanislav Sedov  */
33*ae771770SStanislav Sedov 
34*ae771770SStanislav Sedov /* $Id$ */
35*ae771770SStanislav Sedov 
36*ae771770SStanislav Sedov #include "mech_locl.h"
37*ae771770SStanislav Sedov 
38*ae771770SStanislav Sedov GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_pseudo_random(OM_uint32 * minor_status,gss_ctx_id_t context,int prf_key,const gss_buffer_t prf_in,ssize_t desired_output_len,gss_buffer_t prf_out)39*ae771770SStanislav Sedov gss_pseudo_random(OM_uint32 *minor_status,
40*ae771770SStanislav Sedov 		  gss_ctx_id_t context,
41*ae771770SStanislav Sedov 		  int prf_key,
42*ae771770SStanislav Sedov 		  const gss_buffer_t prf_in,
43*ae771770SStanislav Sedov 		  ssize_t desired_output_len,
44*ae771770SStanislav Sedov 		  gss_buffer_t prf_out)
45*ae771770SStanislav Sedov {
46*ae771770SStanislav Sedov     struct _gss_context *ctx = (struct _gss_context *) context;
47*ae771770SStanislav Sedov     gssapi_mech_interface m;
48*ae771770SStanislav Sedov     OM_uint32 major_status;
49*ae771770SStanislav Sedov 
50*ae771770SStanislav Sedov     _mg_buffer_zero(prf_out);
51*ae771770SStanislav Sedov     *minor_status = 0;
52*ae771770SStanislav Sedov 
53*ae771770SStanislav Sedov     if (ctx == NULL) {
54*ae771770SStanislav Sedov 	*minor_status = 0;
55*ae771770SStanislav Sedov 	return GSS_S_NO_CONTEXT;
56*ae771770SStanislav Sedov     }
57*ae771770SStanislav Sedov 
58*ae771770SStanislav Sedov     m = ctx->gc_mech;
59*ae771770SStanislav Sedov 
60*ae771770SStanislav Sedov     if (m->gm_pseudo_random == NULL)
61*ae771770SStanislav Sedov 	return GSS_S_UNAVAILABLE;
62*ae771770SStanislav Sedov 
63*ae771770SStanislav Sedov     major_status = (*m->gm_pseudo_random)(minor_status, ctx->gc_ctx,
64*ae771770SStanislav Sedov 					  prf_key, prf_in, desired_output_len,
65*ae771770SStanislav Sedov 					  prf_out);
66*ae771770SStanislav Sedov     if (major_status != GSS_S_COMPLETE)
67*ae771770SStanislav Sedov 	_gss_mg_error(m, major_status, *minor_status);
68*ae771770SStanislav Sedov 
69*ae771770SStanislav Sedov     return major_status;
70*ae771770SStanislav Sedov }
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